Adjustable blade for mixing machines



Feb 12 c. c. MOSHER ADJUSTABLE BLADE FOR MIXING MACHINES Filed May 14, 1923 2 Sheets-Sheet l Feb. 12 1924.

. C. C. MOSHER R MIXING MACHINES Filed May 14, 1923 2 Sheets-Sheet 2 Patented Feb. l2, 119524.

mean

a are.

GLIFFORD C. MOSHER, F LIMA, OHIQ.

ADJUSTLE BLADE FOR MIXING- MACHINES.

Application filed ifiay 14, 1923. Serial No. 638,807.

,To all whom it may concern:

Be it known that I, CLIFFORD C. Mosrr'sn, a citizen. of the United States, residing at Lima, in the county of Allen and Stateof 5 Ohio, have invented new and useful Tmprovements in Adjustable Blades for Mixing Machines, of which the following is a specification.

This invention relates to mixing machines of general applicatiomfor example to rubber mixers, dough mixers, concrete and as-- phalt mixers and similar machines, and consists in an improved form of adjustable blade for use in such machines.

In machines of the kind"to which the present invention is applicable, the blades are set at an angle to the axis of the shaft so as to exert longitudinal impelling action on the material, either to feed it towards one end of the drum or from both ends towards the center Qfthesame, some machines being what is known as of the end-dump type, and others as of the center bottom-dump type. The blades are set staggered on the shafts so as to act like a screw conveyor. It is also desirable to be able to adjust the blades radially of the shafts to take up wear and to be able to reduce or increase the space between the ends of the blades andthe inside surface of the drum. I

By the improved construction which I have devised and will now describe in detail, the blades can be set so as to constitute in efl'ect either a right-hand or a left-hand screw, and can also be adjusted radially.

In the accompanying drawings, I have illustrated my invention as applied to a machine having two parallel blade-carrying shafts, geared together and passing through 40 a drum having a double semi-circular bottom, but, as will be obvious, it is equally applicable to a machine having but one shaft and a single semi-circular bottom. In the drawings,

Fig. 1 is an end elevation, one half in vertical section through the drum, of a mixer equipped with the improved blades;

Fig. 2 is a plan view of one of the blades complete;

holding arms;

Fig. 4: is a perspective view of one of the blades complete;

Fig. 5 is a similar view looking from the other side;

i ing bolts 12 to be varied to take care of said Fig. 3 is an end view of one of the blade- Fig. 6 is aperspective view of the bladeholding' arm, and

Fig. 7 is a perspective view of the blade proper detached from the arm.

The machine illustrated in these views comprises a drum 1, with double semi-circular bottomto conform to the circles of revolution of the blades and two parallel rotary shafts 2, 2, which carry the blades, these shafts being square in cross-section within the drum, as shown at the right in Fig. 1. 4: represents one of the driving ears, and it will be understood, without urther description or illustration, that the shafts are geared together so as to rotate in opposite directions, as is well known in the art and that it is immaterial to my present invention whether the machine has two shafts or only one.

Each mixing blade consists of a blade holding arm 5, the hub 6 of which is so notched at 8 as to fit on the corners of the square shaft in any one of eight positions around the same, and it is held there by. bolts 9 passed through the holes 1 0. The blade holding arm extends radially from the hub 6 and resembles an angle-iron in form with two plane surfaces 7, at right angles to each other and provided with slots 11, 11, for the bolts 12, 12, by which the blades proper 13, are secured. Each blade has four bolt-ho1es15 for the 'recep tion of said bolts 12, two of said holesbeing. used when the blade is secured to one of the faces 7 and theother two holes being used when the blade is secured to the other face 7 of the arm 5. Each face 7 is further provided with a plurality of parallel transverse notches 16, with which a triangular projection 17 on the blades 13 0'00 crates to hold the latter against slipping, w ile permitting a radial ad uStment of the blades, the slots 11 enabling the position of the blade-securadjustment. I we The exact shape of the blade-holding arms illustrated is not essential to the inventive idea, as expressed in the claims, but mag be varied to suit the circumstances.

aving thus described my invention, what I claim is:

.1. An adjustable blade for mixing machines, comprising a blade-holding arm adapted to be clamped on a shaft and having two radialplane fs at right angles are to each other, and a blade adapted to be secured to either of said faces so as to act with either a right or left hand screw action on the material.

2. Adjustable blades for mixing machines, comprising arms, the hubs of which are notched to fit the corners of a square shaft, and are provided with bolt holes whereby they can be clamped on said shaft, said arms having faces at right angles to each other with slots and transverse grooves, and blade members provided with bolt holes and a transverse r1b, whereby said blade members can be secured to either of said faces, so as to set right or left, and can be radially adjusted on said arms.

3. A mixin machine, comprising a drum, a square sha t passing through the same, arms provided with half hubs fitting said shaft in any one of eight staggered positions around the same, each arm havmg two weasel radial surfaces lying in planes at right angles to each other and at 45 to the axis of the shaft, blades securable to either of said faces, and means whereby said blades can be adjusted radially on said faces.

4:. A mixin machine, comprising a drum and a pair 0' parallel shafts passing therethrough and geared to rotate in opposite di rections, said shafts having a polygonal cross section within said drum, blade-supporting members and means to cla-mp them on said shafts in relatively staggered positions around the same, each of said members having radial plane surfaces set at right angles to each other, and mixing blades adapted to be secured to either of said surfaces. I

In testimony whereof I have hereunto set my hand.

CLIFFORD c. Mos-nee. 

